# class people:
#     def __init__(self,name,age):
#         self.name=name
#         self._age=age
# def _sayHello(self):
#     print('Hello,大家好')
# def greeting(self):
#     self._sayHello()
# def getAge(self):
#     return self._age
# xiaolan=people('小蓝',10)
# xiaolan.greetinf()